Hot-water and steam boiler.



F. J. WALL'ING. HOT WATER AND STEAM BOILER.

APPLICATION FILED JAN.2Z, 1912.

Patented Apr. 8, 1913.

4 SHEETS-SHEET 1.

Withefia awm Noun/um P. J. WALLING. HOT WATER AND STEAM BOILER. APPLICATION FILED JAN. 22, 1912.

1,058,208. Patented Apr. 8, 1913.

SEEETSSHEET 2.

Wiizwsses menial 1 J"; 5 g I By his Atzrney F. J. WALLING.

HOT WATER AND STEAM BOILER.

APPLICATION FILED JAN. 22, 1912.

4 SHEETS-SHEET 3.

Patented Apr. 8, 1913.

Witn6555 (365M F. J. WALLING.

HOT WATER AND STEAM BOILER.-

APPLIOATION FILED JAN. 22, 1912.

Patented Apr. 8, 1913.

4 SH3ETSSHBET B9 M511 r i% highest heating efficiency, with a given FREDERICK J. WALLING, 0F MINNEAPOLIS, MINNESOTA.

HOT-WATER AND STEAM BOILER.

Specification of Letters Patent.

Patented Apr. 8, 1913.

Application filed January 22, 1912. Serial No. 672,530.

To all whom it may concern:

Be it known that I, FREDERICK J. VALL- ING, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Hot ater and Steam Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved and very highly. eflicient hot water or steam boiler adapted for general use but especially adapted for use in heating plants for domestic purposes.

To such ends, generally stated, the invention consists of the novel devices, construction and arrangement, and general combination of parts hereinafter described and defined in the claims.

It is a well known fact that to obtain the amount of coal, the hot coal and the flames must be kept directly in contact with the greatest possible amount of internal heating surface. Hence, in my improved boiler, I provide an annular main shell having a multiplicity of inwardly projecting vertically extended water columns, in direct connection therewith, and which project into the fire box and directly overlie the grate. F urthermore, to insure direct contact of red hot coal with this heating surface, I provide a conical grate which constantly works the burning coal downward and outward against this heating surface. In connec tion with the boiler thus constructed, I preferably also employ a magazine of novel construction and which bears a novel relation to the other parts of the boiler. So far, however, as the broad idea of this invention is concerned, this magazine may be dispensed with, where a self-feeding action is not clesired.

The invention also involves various other novel and important features all of which will be hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, and what I, at present, believe to be the preferred form thereof, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in front elevation showing the improved boiler; Fig. 2 is a transverse vertical section taken centrally through the boiler; Fig. 3 is a horizontal section taken through the boiler on the line 00 00 on Fig. 2; Fig. 4: is a fragmentary plan view of the grate, portions thereof being diagrammatically indicated by dotted lines; Fig. 5 is a detail view in plan showing the bearing trunnion of the grate support; Fig. 6 is a side elevation of the parts shown in Fig. 5; Fig. 7 is a plan view showing the boiler base and grate support, some parts being broken away; Fig. 8 is a detail in section taken on the line :0 00 on Fig. 7 Fig. 9 is a section taken on the line 00 an on Fig. 3; and Fig. 10 is a horizontal section taken on the line m 00 of Fig. 2.

The main boiler shell 1, which is of a novel construction above generally indicated, rests upon an annular base, preferably in the form of a cast shell 2 having at its front an ordinary ash pit door 3, equipped with the usual draft door.

The main shell 1 is a hollow and preferably cast structure having an upright water chamber, generally of annular form, but which is extended over the top of the fire box and provided with a central magazine passage. More particularly stated, the extreme lower portion of the said shell 1 is preferably of true annular form, but the in ner wall thereof is formed with a multiplicity of water columns 4 that extend vertically downward from the top of the shell, but terminate considerably short of the extreme lower portion thereof. These so called water columns, at their outer portions are directly open to an annular chamber of the shell 1 and in horizontal cross section, they are preferably made V-shaped, and also at their lower extremities are preferably beveled and outwardly inclined, as best shown in Fig. 2. These water columns 4 are circumferentially spaced, but at the front of the boiler, one thereof is terminated far enough below the top of the shell, to afford a fuel entrance passage 5 (see Figs. 1 and 8), that is normally closed by a suitable fuel door 6.

The numeral 7 indicates cold water return pipes which, as shown, open into the bottom of the water chamber of the shell 1, at diametrically opposite points, and the numeral 8 indicates hot water or steam outlet pipes which, as shown, open from the top of the chamber of the said shell also at diametrically opposite points.

At the points between the water columns 4, and just below the top chamber of the body shell 1, smoke outlets 9 open through the body shell 1 and into a smoke acket 10. This smoke jacket 10 is suitably secured to the body shell 1, is of segmental form, and is provided with a smoke pipe 11, preferably located at the rear of the boiler. One of the water columns, preferably the one at the extreme rear, and which is marked r on Figs. 3 and. 9, is extended only part way down from the top of the shell, and the said column is completed by an independent supplemental water chamber 12, preferably in the form of a small cast shell having the same form as the lower extremities of the complete columns 4. This supplemental chamber 12 is to serve as a heater for water to be used for domestic purposes or to be supplied to a hot water tank.

The numerals 13 and 14L indicate, respectively, cold water return pipe and hot water outlet pipe, which pipes are passed through thimbles 15, cast integral with the walls of the shell 1. The inner ends of these pipes 13 and 14 are threaded and screwed through the outer wall of the supplemental chamber 12, so that they afford the required circulating pipes and serve to hold the said supplemental water chamber in position.

The grate, which, as already indicated, is

of conical form, is arranged with its apex projecting upward into the main boiler shell 1 and with its peripheral base portion spaced from the lower portion of the inner wall of said main shell, only far enough to permit the ashes to be worked downward into the ash pit, which latter is, of course, formed within the base shell 2. As preferably constructed, this improved grate comprises a sleeve-like hub 16, a cone tip 17, and downwardly and outwardly diverging circumferentially spaced grate bars 18, all of which parts, 16, 17 and 18 are rigidly connected and adapted to oscillate about a vertical axis, as a unitary structure. To support this grate, a spider bracket 19 is rigidly secured to the base shell 2, and at its center is provided with a bearing trunnion or step 20, the upper surface of which is preferably made slightly conical and with roller seats 21, for rollers 22 that are interposed between the said trunnion and an intermediate bearing web of the hub 16. This roller bearing prevents grinding and makes it an easy matter to oscillate the grate, even when there is a heavy load of coal thereon. As a convenient means for oscillating the grate, a shipper lever 23 is pivoted to the front of the base frame, and is connected by a link 2 1 to a boss 25 on the lower peripheral portion of the grate (see Figs. 1 and 2). Pref-- The upper or main body portion 28 of this magazine may be of any suitable form but the depending delivery spout thereof is preferably made of novel construction and is brought into a novel relation in respect to the radiating fuel spaces 29 formed between the water columns 4:. More definitely stated, the said depending spout 30 of the fuel magazine is formed with vertically extended circumferentially spaced ribs that are preferably V-shaped in cross section and which are suitably spaced from the inner angles of the columns 4 and correspond in spacing thereto and are alined radially with the respective radiating fuel spaces 29. By making the delivery spout of the magazine of the general form stated, the proper clearance space between the water columns at and the magazine delivery spout is afforded, the said delivery spout is given a maximum cross section and fuel containing capacity, and the coal is discharged or delivered as far as possible outward into the said fuel chambers 29.

As shown, the magazine body 28 is provided at its upper portion with a gravity closed door 31. The magazine may be vertically adjusted and held in any desired position for the proper delivery of the coal, by any suitable means, but as shown, it is supported by a cable 32 passed over guide sheaves 33 and having at its depending end a suitable hand piece 3%.

The passage in the central portion of the top of the main shell 1, through which the corrugated feed spout 30 of the magazine is passed, corresponds in contour to the cross section of the said spout, and has only sufficient clearance to permit free movements of the magazine.

With the above described arrangement, it is evident that a very large amount of internal heating surface is directly exposed on one side to the water which is to be heated, and on its outer side to the red hot coal and to the flames. The flames strike directly against the lower wall of the top chamber of the boiler shell 1.

A large part of the red hot coals will be contained in the chamber 29 and held in direct contact with the sides of the water columns 4, and a considerable portion of the red hot coals will lie directly below the lower extremities of the said columns. In fact, practically all the coal is burned at these points. The ashes will be worked downward partly between the grate bars 18, but chiefly between the lower peripheral portion of the grate and the lower portion of the shell 1. Experience has shown thatno clinkers will be formed, but all of the residue will be converted into ashes and worked downward, as stated. The conical grate tip 17 divides the downwardly moving column of coal and closes the draft at the central portion of the body of the coal, so that the coal will not be burned at the center of the grate.

Actual use of a boiler constructed, as illustrated in the drawings, has demonstrated the extremely high efficiency thereof, and economy in the use of fuel. hen the fuel magazine is raised to its highest point, approximately 80 per cent. of the heating area or surface inside of the boiler may be. brought into contact with red hot coals. The vertical adjustment of the magazine will depend chiefly on the condition of the weather, but. somewhat 011 the character and size of the coal used.

lVhen the boiler is to be used for the generation of steam, the annular water chamber formed in the top of the shell 1 should be made of such depth as to afford a steam space above the water of the boiler.

Vhat I claim is:

1. In a boiler of the kind described, the combination with a hollow shell forming a water chamber and having laterally spaced vertically extended water columns projecting inward therefrom, of a grate within said shell having its marginal port-ion underlying the lower extremities of said water columns, and spaced therefrom such distance that the lower portions of said water column will be embedded in the burning fuel contained on said grate, said water column being continuous from their lower extremities up to the top of said shell.

2. In a boiler of the kind described, the combination with a hollow shell forming a water chamber and having laterally spaced vertically extended water columns project-- ing inward therefrom, Of a grate within said shell having it marginal portion underlying the lower extremities of said wa ter columns, and a centralfuel magazine extending into the upper portion of said shell, the lower extremities of said water columns being so related to said grate and to the lower end of said fuel magazine, that they will be embedded in the fuel delivered onto said grate from said magazine.

3. In a. boiler of the kind described, the combination with a hollow shell forming a water chamber and having laterally spaced vertically extended water columns projecting inward therefrom, of a grate within said shell having its marginal portion underlying the lower extremities of said water columns, and a fuel entrance passage opening laterally through said shell, the lower extremities of said water columns being so related to said grate and to said fuel entrance passage, that they will be embedded in the body of coal delivered onto said grate through the said fuel entrance passage.

41. A boiler of the kind described, having a water chamber formed in the body of its main shell, the said main shell having inwardly projecting water columns communicating with said water chamber, and one of the said water columns being made shorter than the others and provided with a supplemental independent water heating chamber, the latter having water circulating connections and serving as an auxiliary water heater.

5. In a boiler of the kind described, the combination with a body shell having an annular water chamber and water columns communicating with said water chamber and projecting radially inward therefrom, of a fuel magazine projecting downward through the top of said body shell, and having longitudinal corrugations spaced from said water columns and projecting radially outward on lines extending between the said water columns, substantially as described- 6. In a boiler of the kind described, the combination with a body shell having an annular water chamber and water columns communicating with said water chamber and projecting radially inward therefrom, of a fuel magazine projecting downward through the top of said body shell, and having longitudinal corrugations spaced from said water columns and projecting radially outward on lines extending between the said water columns, the said magazine being vertically adjustable.

In testimony whereof I aflix my signature in presence of two witnesses.

FREDERICK J. WVALLING. Vitnesses HARRY D. KILcoRE, F. D. MERCHANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. C. 

